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DK0685743T3 - Power measuring circuit with a mutually coupled transformer and an integration circuit - Google Patents

Power measuring circuit with a mutually coupled transformer and an integration circuit

Info

Publication number
DK0685743T3
DK0685743T3 DK95401162T DK95401162T DK0685743T3 DK 0685743 T3 DK0685743 T3 DK 0685743T3 DK 95401162 T DK95401162 T DK 95401162T DK 95401162 T DK95401162 T DK 95401162T DK 0685743 T3 DK0685743 T3 DK 0685743T3
Authority
DK
Denmark
Prior art keywords
circuit
integration circuit
power measuring
mutually coupled
coupled transformer
Prior art date
Application number
DK95401162T
Other languages
Danish (da)
Inventor
Michel Dubin
Original Assignee
Schlumberger Ind Sa
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schlumberger Ind Sa filed Critical Schlumberger Ind Sa
Application granted granted Critical
Publication of DK0685743T3 publication Critical patent/DK0685743T3/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R21/00—Arrangements for measuring electric power or power factor
    • G01R21/133—Arrangements for measuring electric power or power factor by using digital technique
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12—Analogue/digital converters
    • H03M1/20—Increasing resolution using an n bit system to obtain n + m bits
    • H03M1/201—Increasing resolution using an n bit system to obtain n + m bits by dithering

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Transformers For Measuring Instruments (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Networks Using Active Elements (AREA)
  • Burglar Alarm Systems (AREA)
  • Amplifiers (AREA)
  • Analogue/Digital Conversion (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

A current measurement circuit comprising a mutual inductance transformer (3), an integration circuit (2), and a dither circuit (1) which adds a square wave to the signal from the transformer (3) before the input of the integration circuit (2) in order that the integration circuit (2) provides a signal representing the measured current perturbed by a triangular dither signal. <IMAGE>
DK95401162T 1994-06-01 1995-05-19 Power measuring circuit with a mutually coupled transformer and an integration circuit DK0685743T3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9406675A FR2720835B1 (en) 1994-06-01 1994-06-01 Current measurement circuit comprising a mutual inductance transformer and an integrator circuit.

Publications (1)

Publication Number Publication Date
DK0685743T3 true DK0685743T3 (en) 2001-11-12

Family

ID=9463749

Family Applications (1)

Application Number Title Priority Date Filing Date
DK95401162T DK0685743T3 (en) 1994-06-01 1995-05-19 Power measuring circuit with a mutually coupled transformer and an integration circuit

Country Status (14)

Country Link
US (1) US5574380A (en)
EP (1) EP0685743B1 (en)
CN (1) CN1052073C (en)
AT (1) ATE203830T1 (en)
CA (1) CA2150635C (en)
DE (1) DE69521938T2 (en)
DK (1) DK0685743T3 (en)
ES (1) ES2161837T3 (en)
FR (1) FR2720835B1 (en)
GR (1) GR3037034T3 (en)
HU (1) HU216994B (en)
PT (1) PT685743E (en)
RU (1) RU2160903C2 (en)
ZA (1) ZA954456B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003085430A (en) * 2001-09-12 2003-03-20 Hitachi Ltd Transformer order support method
JP5124476B2 (en) * 2005-12-15 2013-01-23 奇美電子股▲ふん▼有限公司 Current measuring circuit and method
DE102006038031A1 (en) * 2006-05-26 2007-11-29 Rohde & Schwarz Gmbh & Co. Kg Measuring device for measuring the power of a high frequency signal comprises a dither injection unit arranged between a detector and an analogue/digital converter for injecting a dither signal
CN103020379B (en) * 2012-12-26 2016-12-28 中国科学院微电子研究所 Method for extracting capacitance of interconnection structure
US20140285180A1 (en) * 2013-03-25 2014-09-25 National Instruments Corporation Circuit to Compensate for Inaccuracies in Current Transformers
CN105353203A (en) * 2015-12-10 2016-02-24 成都宏凯瑞科技有限公司 Multifunctional power tester based on band-pass filtering circuit
JP2021016028A (en) * 2019-07-10 2021-02-12 オムロン株式会社 Ad conversion device, ad conversion method, and signal processing apparatus
WO2025136853A1 (en) * 2023-12-21 2025-06-26 Landis+Gyr Technology, Inc. Electricity meter

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU499662A1 (en) * 1974-05-12 1976-01-15 Азербайджанский Институт Нефти И Химии Им.М.Азизбекова Analog-to-digital power converter and effective value of alternating voltage
SU581437A1 (en) * 1976-04-19 1977-11-25 Пензенский Политехнический Институт Converter of active power and squared effective ac voltage into time interval
US4187466A (en) 1978-01-16 1980-02-05 Rolm Corporation Signal injection technique
US4255707A (en) * 1979-08-07 1981-03-10 Westinghouse Electric Corp. Electrical energy meter
DE3173303D1 (en) * 1980-09-01 1986-02-06 South Eastern Elec Board Method of and apparatus for converting an analogue voltage to a digital representation
US4467320A (en) * 1982-05-06 1984-08-21 The Bendix Corporation Measurement of a linear variable differential transformer signal by phase conversion
NL8420205A (en) * 1983-08-01 1985-06-03 Robinton Prod Inc POWER MEASUREMENT SYSTEM AND METHOD.
GB8426822D0 (en) * 1984-10-23 1984-11-28 Day S Static electricity meter
FR2648565B1 (en) * 1989-06-16 1991-10-11 Schlumberger Ind Sa INPUT CIRCUIT FOR ELECTRICAL ENERGY METER
IT1240168B (en) * 1990-04-05 1993-11-27 Marelli Autronica ANALOG / DIGITAL CONVERSION SYSTEM WITH INCREASED RESOLUTION.
US5265267A (en) * 1991-08-29 1993-11-23 Motorola, Inc. Integrated circuit including a surface acoustic wave transformer and a balanced mixer
US5180979A (en) * 1991-10-07 1993-01-19 Honeywell Inc. Position measurement sensor using a linear variable differential transformer with a triangular pulse input and output
JPH06130098A (en) * 1992-09-07 1994-05-13 Mitsubishi Electric Corp Signal input control method and device for electronic watt hour meter etc.
ES2125961T3 (en) 1993-02-26 1999-03-16 Schlumberger Ind Sa ANALOG-TO-DIGITAL CONVERTER WITH A MODULATED ACTIVATION SIGNAL.

Also Published As

Publication number Publication date
EP0685743A1 (en) 1995-12-06
DE69521938D1 (en) 2001-09-06
ZA954456B (en) 1996-03-19
FR2720835A1 (en) 1995-12-08
CA2150635C (en) 2002-11-05
RU95108873A (en) 1997-02-10
CN1052073C (en) 2000-05-03
PT685743E (en) 2002-01-30
CA2150635A1 (en) 1995-12-02
HU9501594D0 (en) 1995-07-28
ES2161837T3 (en) 2001-12-16
RU2160903C2 (en) 2000-12-20
GR3037034T3 (en) 2002-01-31
HUT72215A (en) 1996-03-28
FR2720835B1 (en) 1996-07-12
ATE203830T1 (en) 2001-08-15
DE69521938T2 (en) 2002-04-04
EP0685743B1 (en) 2001-08-01
US5574380A (en) 1996-11-12
CN1116309A (en) 1996-02-07
HU216994B (en) 1999-10-28

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